Thermostatic valve.



G. F. SCHWARTZ.

THERMOSTATIC VALVE.

APPLICATION FILED OCT-30.1915.

159.390 Patented Jan. 2,1917.

2 SHEETSSHEET I.

G. F. SCHWARTZ.

THERMOSTATIC VALVE- APPLICATION FILED 00130-1915.

Patented Jan. 2,1917.

2 SHEETS-SHEET 2 WM; memes: ZZ

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3F. SCHWARTZ, 025 ST. LDUIS, MISSQURI. I

THEELIQSTATIC Specincatlonoi Letters Patent.

Patented Jan, 25191'3'.

Application filed Cvcto'oer so, W15. serial l lo. eases.

To all whom it may concern:

Be it known that 'l, Gnnnannr F. Sonwsnrz, a citizen or United Eitates of America, residing in the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in lhermd static Valves, of which the following is a specification.

The object of this invention is to provide a valve for closing or opening the supply of gas'to a burner, said valve being controlled by thermostatic means acting automatically and with a snap action, that is to say, a rapid closing movement or opening movement as the case may be, when the temperature arrives at the predetermined points for which the instrument is set to operate. This object is accomplished by providing between the thermostatic member and the valve stem a spring-actuated mechanical movement, comprising a lever adapted to be engaged by a trip on the thermostatic member, whereby the lever is drawn to one side or the other of the trip, such movement taking place under the impulse of the spring, and being rapid and of suficient extent to completely open or close the valve as the case may be. With these and other objects in View, my invention is shown in the accompanying drawings, and will be hereinatterv u more fully described with reference thereto,

and finally pointed out in the claims.

In the drawings, Figure 1 is a vertical sectional view of one form of my device,-

Fig. 2 is a vertical sectional view of a slightly modified form or" construction, Fig. 3 is a horizontal sectional view taken on the line 33 of Fig. 2, and Fig. 4: is a sectional view taken on the line 4 l of Fig. 2, and

showing the rear of the device.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, and more particularly to Fig. 1 thereof, the exterior casing A has at the top and bottom, suitable extensions A, A in which are guided the upper portion C and the lower portion D of a thermostatic member. Between said portions 0 and D is located a plurality of expansible devices A forming the thermostatic element, and composed preferably of a porcelain rod and a copper tube. The lower portion D of the thermostatic member is supported by a spring B adjustable within the portion A of the caslng. Secured to the casing A is a valve housing 5 having a lower seat lL upon which the valve 'l may rest and thereby close the passage oi gas from the inlet M to the outlet oi the valve casing. An upper seat K is also provided for the valve J, and when the valve is seated thereon, as indicated in the drawing, is permitted to flow through the valve casing J The-valve has an upwardly-projecting stem Lwhich is provided with a slot having upper and lower knife lit, S. The valve stem is guided at its upper end in a suitable socket l the cue A To the casing A within same, is pivoted at H a lever G, to the upper end of which is pivoted at W a tilting lever F, one and Y oi which enters the slot of the valve'stem between the knife edges R, 8. At its opposite end said tilting lever F is provided with an antit'riction roller X, which is adapted to be engaged by an angular projection or trip 0 extending laterally from the lower part D of the thermostatic member. A. tension spring E is connected-withthe lever G at its upper end W, and is also connected with the portion D of the thermostatic member at a point P approximately in line with the apex of the trip (Des shown in the drawing. A similar spring E is arranged at theopposite side of the device and connected in the $211116 manner.

said bushing 11 ,is connected to a housing member 13 by means of a tube it, and'disposed within the said tube there is provided a porcelain rod 15, which rests upon a plunger 16 operating throughan aperture 1'3 in the said housing. Recessed hangers 18 and 19 are provided in the said housing at eitherside of the aperture 20, and supported within the recesses thereof by means of a to edges 21 and 22, there is provided a lever 23, connected at its outer end to the member D. The said knife edges are arranged slightly behind the said plunger, and a set screw 24 is provided extending through the said lever and engaging the plunger, so that by a all movement of the thermostatic member at large movement is imparted, to the member D for actuating the snap valve, and by regulation of the said set screw this action may be varied as desired. The action of. the snapvalve is otherwise similar to the first form of construction.

The operation of the apparatus is as iollowsr. lhe valve being in open position as shown, the temperature of the thermostatic element A is assumed to rise. Thereby the rod D is moved downwardly against the force of the spring B. As soon as the point ofthe trip 0 passes the center line of the antifriction roller X, the springs E pull the lever F toward-the rod D, the antifriction roller X then riding upon the upper inclined. face of the trip. The result of this motion is to throw rapidly downward with a snap action, the outer end Y of the lever F, and thereby move the valve stem 1 and the valve J downwardly until the valve rests upon the seat L and closes the gas supply. When the temperature of the element A is reduced suiiiciently to bring about the return of the rod D, in upward direction, the trip O engages-the anti-friction roller X at its lower side, and, the lever F being held in fixed position against upward movement at its roller-carrying end by reason of the fact that its outer end is engaged by the valve stem and pressing downwardly upon the same, the trip 0 passes'upwardly beyond the center line of the antitriction roller X, and

when its apex arrives above said center line, the springs E act to rapidly pull backward the lever F, the antifriction roller then passing downwardly along the lower inclined face of the trip 0 into the position shown in the drawing, such movement of the lever acting to raise the valve stem and valve, so that the flow of the gas is again permitted.

The devicedescribed provides a very simple and effective and reliably-acting thermostatic valve closing with a snap action at' predetermined points in the travel of the rod D, namely, at predetermined temperatures, according to which the thermostatic member is-regulated by mea'iis of the balancin spring B. It will-be understood that shoul the spring B become inoperative, as

for instance, by crystallization, the mechanism would still work by the operation of the thermostatic member alone.

I have described one embodiment of the invention, but it is obvious that changes may be made therein without departing from the spirit of the invention as defined in the ap-' pended claims.

- I claim I 1. A thermostatic valve, comprising a thermostatic member, a valve, a valve-stem, a tilting lever engaging said valve stem, a pivoted standard pivotally supporting said tilting lever, the pivot point of said lever being movable, a trip member adapted to be actuated by said thermostatic member, said trip member engaging one end of said tilting lever, the other end of said tiltin lever engaging and adapted to actuate sai valve stem.

2. A thermostatic valve, comprising a thermostatic member, a valve stem, a tilting lever engaging said valve stem, a pivoted standard pivotally supportin said tilting lever, the pivot point of sai lever being movable, a trip member adapted to be recipa trip member adapted to be actuated by said thermostatic member, said trip member engaging the end of said tilting lever, the other end of said tilting lever engaging said slot of the valve stem and adapted to actuate the valve stem. p

4:- A thermostatic valve, comprising a thermostatic member, a valve stem, a tilting lever engaging said valve stem, a pivoted standard pivotally supporting said tilting lever, the pivot point of said lever being movable, a trip member carried directly by said thermostatic member, said trip memberengaging oneend of said tilting lever, the other end of said tilting lever engaging and adapted to actuate said valve stem.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

GERHARDT F. SCHWARTZ.

VVitnessesz' J. M. MURPHY, B. FISHER. 

